Spring-tooth harrow



(No Model.)

S. RITTY. SPRING TOOTH HARROW.

No. 419,971. Patented Jan.21,1890.

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UNITED STATES ATENT OFFICE.

SEBASTIAN RITTY, OF DAYTON, OHIO, ASSIGNOR TO A. W. STEVENS dz SON,

OF AUBURN, NEW YORK.

SPRlNG-TOOTH HARnow.

SPECIFICATION forming part of Letters Patent No. 419,971, dated anuary 21, 1890. Application filed May 14,1889. Serial No. 810,734: (No model.)

To all whom it may concern:

Be it known that I, SEBASTIAN RITTY, a

a citizen of the United States, residing at Dayand of fastening the teeth at said points,

whereby, as will appear from the ensuing description, the removal of the bolts which hold the teeth knocks down the entire harrow, so that the straight frame-bars may be packed or bundled for shipment by themselves and the teeth separately bundled, bringing the whole within small compass.

In the drawings, Figure 1 is a perspective view of a harrow constructed according to my invention, and Fig. 2 is an enlarged do: tail of the joints between the draft-bars and cross-bars with said bars in position and a pair of the draft-bars united. Fig.3 is avertical longitudinal section through one of said joints, and Fig. 4. a vertical transverse sec tion; and Figs. 5 and 6 are respectively enlarged details in top and bottom plan view of the clips at the joint.

A represents the draft-bars of a harrow, and B the cross-bars. These are straight bars of iron or steel, preferably rolled with a central longitudinal channel a for strengthening-that is to say, the channel is formed by rolling the bar from the plate so as to present a rib 011 one side and a groove on the other, the rib in the assembled harrow being uppermost in the draft-bars, while in the crossbars it is undermost, that the flat faces of the bars may be in contact with each other. The forward ends of the draft-bars where they meet are flattened vertically or curved, as at b, so as to overlap and be bolted together, although it is evident they may be otherwise secured at this point. To the front draft bars are secured the usual draft--clips for the attachment of the drag-bar D, to which the team is hitched.

F is a chair for the reception of the draft bars of the frame at the points where they intercept the cross-bars. This is in general terms a rectangular plate with the superfluous metal cut away at two points f, and having bolt-holes f in each end orwing. A seat F, guarded by snugs f separated by the width of the draft-bar, runs diagonally across the top of this chair and has two bolt-holes f one near the end, but diagonally across from each other, to receive bolts F which pass through the draft-bar alternately on each side of its central rib and groove and secure it to the chair. The bolt-holes are advisably countersunk on the upper side of the chair, that the heads of the bolts may lie flush and not interfere with the oppo site, and in,some respects similar, chairs secured to the cross-bars, as will be presently explained. The under side of this draftbar chair has also a seat F but convex and rounded from the center toward either side of and parallel with the line of draft of the harrow that is, at such an angle to the length of the chair as to about bisect the angle formed by the union of the draft and cross bars, and this seat constitutes one member of the tooth-fastening.

G represents chairs converse to those just described, having practically the same outline and cut away for lightness at g, with boltholes g at each end or wing, and also having a seat G, guarded by snugs 9 for the reception of the upper face of the cross-bar. The

bolt-holes in the wings are outside of the just mentioned seat and match the bolt-holes in the wings of the opposing draft-bar chair; but other bolt-holes f are formed at each end of the seat, but diagonally across from each other, to receive the bolts which unite the chair to the cross-bar. Thus when the draftbars and crossbars to which the respective chairs are secured are brought together at the proper angle of intersection, two bolts passing through the holes in the wings will serve to unite said bars and the removal of the bolts will serve to detach them without detaching the chairs from the bars themselves.

The last-mentioned chair-that is, the one secured to the cross-bars-has on its upper face a concave seat G matching the convex seat upon the draft-bar chair and at the same angle in the frame, and this second seat constitutes the reverse member of thetooth-fastf together are loosened, and being adjusted to the proper position these bolts are tightened down, when the convex seat on the upper chair will force the shank of the tooth down into the concave seat in the lower chair'an d 3 clamp it firmly into position,- the frame b'ars being at the. same time" and by the same tightening of the bolts; firmly secured togethcr at the point where the particular toothis applied.-

Should. occasion arisefor adjusting the tooth or removing and replacing a broken tooth, the nuts on the bolts whichunite the chairs together can be loosenedgas before, without detaching the chairs themselves from the frame-bars and can be'tightened up after the change has been" made; but when itis desired toknock down the harrow' these bOItSWi-ll be entirely removed, thus at the same time detaching the teeth and separat ing the frame'bars, but leaving eachof the latter with itsrespecti-vechair-plates secured in position and ready for'reassembling of the harrow at any time. When thus knocked down, the frame-bars can be bundled orbound together separately in small coin-pass and the teeth piled or nested togetherandalso bundled or boxed for shipment.

I am aware that metallic chairs have here-- States No. 17,151, granted April 28, 1857, to-

M. G. Hubbard, and also that spring=-teeth in harrows have been secured above the point of intersection of the frame-bars and above said frame-bars themselves or in seats formed i in blocks to receive said frame-bars; but I aninot aware that a h-arrow has ever been I made in which the spring-teeth were secured in seats between said frame-bars at the point I Where they intersect each other, or in which the removal of the bolts which serve to clamp the teeth in their seats of itself dismantles ithe' harrow by separating the frame-bars.

I claim as my invention- 1. The combination, substantially as here- ;inbefore set forth, in a harrow, of the metal "draft and cross bars, the chairs secured, respectively, to the under faces of the top bars f and the upper face of the bottom bars at their points of intersection and having seats for the spring-teeth in their meeting faces, the bolts securing said chairs together independently of the" frame bars', and the springtooth clamped between said: chairs. 2 The combination, substantially as here inbefore set forth, of the" metal draft. and ';cross; bars, the chairs F, secured to one set of 1 said bars and having convex seats, theclrairs G, secured to'the other set; of said bars and ihaving, concave seats matching the convex seat on the opposite chair, the bolts passing ithrou'gh Wings of said plates outside of the I: frame-barsto unite them together, and the r spring-tooth secured between the convex and .5 concave seats.

l 3. The combination, substantially as here- 1 iinbefore set forth, ina harrow, of the draftibarslongitudinallychanneled to form a rib seats on their under faces, the cross-bars longitudinally channeled to form a rib on ;their lower faces, the chairs G, having diagonal seats secured tothe topof said cross-bars iby bolts arranged alternately on either side ,5 of said bars and providedon their upper ifaces with convex seats, the curved springt0oth, and the bolts passing through the ends Eor wings of said chairs outside of the draft iand cross bars and. uniting the whole together.

SEBASTIAN RITTY.

Witnesses HENRY FISCHER,

l S. H. CARR. 

